[gtk] (5 commits) Non-fast-forward update to branch wip/matthiasc/gsk-hdr

[Matthias Clasen <matthiasc src gnome org>]

The branch 'wip/matthiasc/gsk-hdr' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  164157f... gsk: Add high depth rendernode api
  80dbf8a... ngl: Allow specifying texture formats
  c8a5038... ngl: Determine intermediate formats
  a7a24cd... ngl: Update framebuffer format for each frame
  a447d63... ngl: Make render_texture high depth aware

Commits added to the branch:

  d6f407d... gsk: Add high depth rendernode api
  76c011e... ngl: Allow specifying texture formats
  dc8b395... ngl: Determine intermediate formats
  1facecd... ngl: Update framebuffer format for each frame
  6141122... ngl: Make render_texture high depth aware